: FINISHED FILES ARE THE RE-
SULT OF YEARS OF SCIENTIF-
IC STUDY COMBINED WITH
THE EXPERIENCE OF YEARS.

Now count ALOUD the F’s in that sentence.
Count them ONLY ONCE: do not go back and count them again.
See below…
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ANSWER:

There are six F’s in the sentence. One of average intelligence
finds three of them. If you spotted four, you’re above average.
If you got five, you can turn your nose at most anybody. If you
caught six, you are a genius. There is no catch. Many people
forget the “OF”‘s. The human brain tends to see them as V’s and
not F’s. Pretty weird, huh? It fools almost everybody.